Data driver device and display device for reducing power consumption in a charge-share operation
a data driver and charge-share technology, applied in the field of semiconductor devices, can solve the problems of increasing power consumption of charge-share switches, power consumption due to a share current in charge-share switches, and generating a large amount of heat in data driver devices, so as to reduce power consumption in charge-share switches
Active Publication Date: 2008-07-17
SAMSUNG ELECTRONICS CO LTD
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Benefits of technology
The present invention provides a data driver device and display device that reduces power consumption in charge-share switches when a display panel is charge shared. This is achieved by using first and second charge-share switches that are connected between a share line and data lines or between adjacent data lines, respectively. The data driver device also includes a digital-to-analog converter block and an output circuit with data lines, first and second charge-share switches. The technical effect is to improve the efficiency of the display device and reduce power consumption.
Problems solved by technology
When the value of the load resistor of the display panel is decreased and the load capacitance of the display panel is increased, the power consumed in the data driver device to drive the source lines of the display panel increases, causing a considerable amount of heat to be generated in the data driver device.
More specifically, power consumption increases significantly in charge-share switches included in an output circuit of the data driver device.
When a load resistance of a source line in a display panel decreases and a load capacitance of the source line increases, power consumption due to a share current in charge-share switches increases considerably.
Method used
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[0024]Exemplary embodiments of the present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those of ordinary skill in the art. In the drawings, like numbers refer to like elements throughout.
[0025]FIG. 3 illustrates an output circuit 300 according to an exemplary embodiment of the present invention. Referring to FIG. 3, the output circuit 300 includes a plurality of data lines D1 through Dn, a plurality of amplifiers 121 through 12n, a plurality of data line switches T1 through Tn, a plurality of first charge-share switches H1 through Hn, a plurality of seco...
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A data driver device and a display device, in which the data driver device includes a plurality of data lines; a plurality of first charge-share switches connected between a share line and the plurality of data lines, respectively; and a plurality of second charge-share switches each connected between two adjacent data lines among the plurality of data lines.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATION[0001]This application claims priority under 35 U.S.C. §119 from Korean Patent Application No. 10-2007-0004868, filed on Jan. 16, 2007, the disclosure of which is hereby incorporated by reference herein in as if set forth in its entirety.FIELD OF THE INVENTION[0002]The present disclosure relates to a semiconductor device and, more particularly, to a data driver device and display device for reducing power consumption of charge-share switches during charge-share of a display panel.BACKGROUND OF THE INVENTION[0003]With the development of semiconductor technology, display devices tend to have a large size in order to satisfy the consumers' demand. As a display device becomes large, the load of a display panel, for example, a liquid crystal display (LCD) panel, increases. Source lines or data lines in the display panel are driven by a data (or source) driver device.[0004]When a display device, for example, an LCD television (TV), becomes larg...
Claims
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IPC IPC(8): G09G5/00G09G3/36
CPCG09G3/3614G09G2330/021G09G2310/0248G09G3/3688G09G3/20G09G3/36G02F1/133
Inventor PARK, JUN-HONGSUNG, SI-WANGCHOI, HEE-SOOK
Owner SAMSUNG ELECTRONICS CO LTD